Table 1. Characteristic binding energies and element ratios obtained from XPS measurements on untreated Ga-Zn-oxynitride samples Sample Zn/Ganom Ga 3d (eV) Ga AP a (eV) N 1s (eV) N/GaXPS O 1s (eV) Zn 2p (eV) Zn/GaXPS Ga2O3 -- 20.5 1082.7 -- -- 531.4
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